Ausonia is a town and comune in southern Lazio, central Italy. It takes its name from the Ausoni/Aurunci, whose ancient town Ausona (member of the Auruncan Pentapolist), located nearby, was destroyed by the Romans in 314 BC. In the Middle Ages it was known as Fratte.
The main attraction is the sanctuary of Santa Maria del Piano (15th century, although founded in 1100).